How does a covering index work?

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Can we have exception part in trigger ?

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How to select random rows from a table?

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Are views faster than queries?

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4. Select sum(A.salary) +sum(B.salary) as TOT_SAL from ( select LEVEL emp_id,level*100 salary,case when mod (level,2)=0then 2 else null end dept_id from dual connect by level<6 )A right outer join (select level emp_id ,level*200 salary ,case when mod (level,3)=0 then 2 else null end dept_id from dual connect by level<6)B On A.dept_id=B.dept_id And A.emp_id=B.emp-id;

1 Answers   Fintellix,

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table name: prod there are three fields in the table that are 1.proddate 2.prodQty 3.model Day wise prodQty is stored in the table prod write a query to display total prodqty in the year 2004 april.

2 Answers   Maruti Suzuki,

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Can we debug stored procedure?

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What is a pl/sql block?

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what are the type of locks ? : Sql dba

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What is trigger in flip flop?

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How One can easily select all even, odd, or Nth rows from a table using SQL queries?

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What is difference between hql and sql?

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